Facile Strategy for Modulating the Nanoporous Structure of Ultrathin pi-Conjugated Polymer Films for High-Performance Gas Sensors
- Authors
- Tran, Vinh Van; Jeong, Gwanghoon; Kim, Keun Seong; Kim, Jeongho; Jung, Hong-Ryun; Park, Byoungnam; Park, Jong-Jin; Chang, Mincheol
- Issue Date
- Jan-2022
- Publisher
- AMER CHEMICAL SOC
- Keywords
- nanoporous structures; conjugated polymers; gas sensors; solution shear coatings; organic field-effect transistors
- Citation
- ACS SENSORS, v.7, no.1, pp.175 - 185
- Journal Title
- ACS SENSORS
- Volume
- 7
- Number
- 1
- Start Page
- 175
- End Page
- 185
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/84558
- DOI
- 10.1021/acssensors.1c01942
- ISSN
- 2379-3694
- Abstract
- Conventional conjugated polymer (CP) films based on organic field-effect transistors (OFETs) tend to limit the performance of gas sensors owing to restricted analyte diffusion and limited interactions with the charge carriers that accumulate in the first few monolayers of the CP film in contact with the dielectric layer. Herein, a facile strategy is presented for modulating the morphology and charge-transport properties of nanoporous CP films using shearing-assisted phase separation of polymer blends for fabricating OFET-based chemical sensors. This approach enables the formation of nanoporous films with pore size and thickness in the ranges of 90-550 and 7-27 nm, respectively, which can be controlled simply by varying the shear rate. The resulting OFET sensors exhibit excellent sensing performance when exposed to NH3 gas, demonstrating a high responsivity (approximate to 70.7%) at 10 ppm and good selectivity toward NH3 over various organic solvent vapors. After a comprehensive analysis of the morphology and electrical properties of the CP films, it is concluded that morphological features, such as film thickness and surface area, affect the sensing performance of nanoporous-film-based OFET sensors more significantly compared to the charge-transport characteristics of the films.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - ETC > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/84558)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.